Macalaster does have the highest admission rate of that group- but your SAT puts you in the bottom 25% of accepted students (only 7% of admitted students had a math score under 600).
ACT & SAT can vary a lot for some people- maybe it will for you.
Did you take the AP for Calc, or just do the course? Do you have subject tests? if no to both, the only external indicators that the schools have to go on is your dual enrollment marks and SAT.
Those schools are all welcoming to homeschooled students- but a) they need to know that you can do high level work at a high level of intensity, and b) you are competing with seriously qualified students.
Does your brief summary of your ECs undersell what you have? do you have some that show depth? ie, commitment over time, growth in responsibility, evidence of being a good team member / leadership / maturity / other?
If not, without something more to give them, I would pick one or two as a super-reach, and then go come up with a new list, including some test optional schools and/or with higher admission rates.